5
Pin
Pin name
I/O
Description / Processing Operation
17
CD_MUTE_R
I
MUTE request from CD mechanism.
“L” : Mute on request
18
NC
O
Not used (N.C.)
19
NC
O
Not used (N.C.)
20
REF_CONT
O
Voltage control of Avref.
“H” : Active
21
CH_REQH
O
Communication reqest to CH.
22
TEST
I
23
TYPE1
I
Tuner 1 setting.
Set up terminal for frontend test mode
24
TYPE2
I
Tuner 2 setting.
Set up terminal for frontend test mode
25
CD_LOS_SW
I
CD loading detection switch.
“L” : Disc, “H” : No disc, “L”
→
“H” : Loading start
26
CD_12EJE_SW
I
12cm disc detection switch.
“L” : 12cm disc detected, “H” : Fixed by 8cm disc detected
27
MUTE
O
Audio mute.
“L” : Mute on
28
P_ON
O
Peripheral power control.
“L” : ACC on/PWR on, “H” : PWR off/ACC off
29
CH_CON
O
CH control output.
“H” : CH on”
30
CH_RST
O
CH reset.
“H” : CH reset
31
CH_MUTE
I
MUTE request from CH.
“H” : Mmute request
32
ANT_CONT
O
Power antenna control.
“H” : PWR on
33
DC/DC
O
VFD display power control.
“H” : Power on. Panel
µ
com VFD-ON terminal confirm “H” after that set “H”.
34
NC
O
Not used (N.C.)
35
NC
O
Not used (N.C.)
36
M_MOTOR
O
CD mechanism main-motor control.
“H” : Motor on
37
VDD
-
Power supply.
38
X2
-
Main clock (12MHz).
39
X1
I
Main clock (12MHz).
40
VSS
-
GND.
41
XT2
-
Sub clock (32.768kHz).
42
XT1
I
Sub clock (32.768kHz).
43
RESET
I
“H” input after initialise.
“L” : Reset (less than 3V)
44
BU_DET
I
BU detection.
“L” : Normal, “H” : Power down
45
NC
O
Not used (N.C.)
46
ACC_DET
I
ACC detection.
“L” : ACC on, “H” : ACC off
47
ILLM_OUT
O
Lamp control.
“H” : Lamp on
48
CH_REQC
I
Changer communication request input.
49
SC_REQ
I
Panel communication request input.
50
R_CLK
I
RDS clock.
51
AVDD
-
Analog power for A/D.
52
AVREF0
-
Reference voltage input for A/D.
53
SMALL
I
SMALL detection.
“L” : SMALL on
54
PHONE
I
TEL detection.
≤
1V : TEL mute
55
R_REEL
I
Cassette mechanism reel pulse input.
Reverse rotation photo input
56
F_REEL
I
Cassette mechanism reel pulse input.
Forward rotation photo input
57
NC
I
Not used (N.C.)
58
NOISE
I
Noise level.
59
SMETER
I
S-METER level.
MICROCOMPUTER’S TERMINAL DESCRIPTION
GX-401EF2
